PLATE IX—Continued. 
Crenipecten AMPLUS. 
Page 81. 
Fig. 9. A left valve showing the cartilage pits along the hinge. The posterior ear as represented is too 
long, giving the figure the aspect of the right valve. 
Fig. 13. A large left valve. The figure should he extended fully 3 mm. on the posterior side to correspond 
with the specimen. 
Fig. 18. An imperfect specimen, somewhat distorted from pressure, and referred to this species with some 
doubt. 
Chemung group. Rockville, N. Y. 
Lyriopecten easciatus. 
Page 65. 
Fig. 10. An imperfect left valve. 
Fig. 11. An enlargement of a portion of the surface showing the fasciculate radii and concentric striae. 
Chemung group. Leon, Cattaraugus Co., N. Y. 
Crenipecten Leon. 
Page 88. 
See. Plate 83. 
Fig. 12. A left valve of this species. Another figure of this specimen is given on plate 83 showing more 
correctly the characters of the hinge and the form of the valve. ' 
Chemung group. Leon, Cattaraugus Co., N. Y. 
Crenipecten impolitus. 
Fig. 
Page 83. 
See Plate 83. 
14. A large left valve showing the form and proportions of this species. The specimen preserves 
traces of distant radiating lines which are not represented in the figure. 
Chemung group. Olean, N. Y. 
Crenipecten obsoletus. 
Page 84. 
Figs. 19, 21. Left and right valves. Fig. 21 is from the original specimen of the species. 
Chemung group. Philipsburg, N. Y. 
Crenipecten glaber. 
Page 85. 
Fig. 20. A view of the original specimen of fig. 10, p. 264, Geolog. Rept. Fourth Dist. N. Y. 1843. 
Fig. 22. A larger specimen referred with some doubt to this specimen. 
Chemung group. Alleghany Co., N. Y. 
Crenipecten micropterus. 
Page 86. 
Fig. 23. A right valve showing the form and surface characters. 
Chemung group. Philipsburg, N. Y. 
Crenipecten liratus. 
Page 87. 
See Plate 83. 
Fig. 24. A left valve. Another figure of this specimen is given on plate 83, to show the size of the ears as 
preserved in the specimen. 
Chemung group. East Randolph, N. Y. 
